You will need a set of vernier calipers to set the cutting height perfectly, if not you have an offset. It includes some instructions for setting up the router, but I had a hard time going through a lot of scrap wood to install it. Create a template for each gauge of wood you want, 1/2, 3/4, etc., and use this as a guide for later adjustments. Remember not to change the planer setting or your setting blocks will be useless since you just changed the thickness of the finished part and your blocks will be different.